dts: arm: silabs: Move efr32mg21 to xg21 directory

Introduce subdirectory for xg21 socs.

Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>

Author: asmellby

boards/silabs/radio_boards/slwrb4180a/slwrb4180a.dts

@@ -5,7 +5,7 @@
  */
 
 /dts-v1/;
-#include <silabs/efr32mg21a020f1024im32.dtsi>
+#include <silabs/xg21/efr32mg21a020f1024im32.dtsi>
 #include <zephyr/dt-bindings/input/input-event-codes.h>
 #include "slwrb4180a-pinctrl.dtsi"
 

boards/silabs/radio_boards/slwrb4180b/slwrb4180b.dts

@@ -6,7 +6,7 @@
  */
 
 /dts-v1/;
-#include <silabs/efr32mg21a020f1024im32.dtsi>
+#include <silabs/xg21/efr32mg21a020f1024im32.dtsi>
 #include <zephyr/dt-bindings/input/input-event-codes.h>
 #include "slwrb4180b-pinctrl.dtsi"
 

dts/arm/silabs/xg21/efr32mg21.dtsi

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2025 Silicon Laboratories Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <silabs/xg21/efr32xg21.dtsi>

dts/arm/silabs/efr32mg21a020f1024im32.dtsi renamed to dts/arm/silabs/xg21/efr32mg21a020f1024im32.dtsi

@@ -5,7 +5,7 @@
  */
 
 #include <mem.h>
-#include <silabs/efr32mg21.dtsi>
+#include <silabs/xg21/efr32mg21.dtsi>
 
 / {
 	sram0: memory@20000000 {

dts/arm/silabs/xg21/efr32xg21.dtsi

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Silicon Laboratories Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <silabs/xg21/xg21.dtsi>
+
+/ {
+	soc {
+		radio: radio@b0000000 {
+			compatible = "silabs,series2-radio";
+			reg = <0xb0000000 0x1000000>;
+			interrupts = <31 1>, <32 1>, <33 1>, <34 1>, <35 1>, <36 1>,
+				     <37 1>, <38 1>, <39 1>, <40 1>;
+			interrupt-names = "agc", "bufc", "frc_pri", "frc", "modem", "protimer",
+					  "rac_rsm", "rac_seq", "prortc", "synth";
+			pa-initial-power-dbm = <10>;
+			pa-ramp-time-us = <10>;
+			pa-voltage-mv = <3300>;
+			pa-2p4ghz = "highest";
+		};
+	};
+};

dts/arm/silabs/efr32mg21.dtsi renamed to dts/arm/silabs/xg21/xg21.dtsi

@@ -367,19 +367,6 @@
 			clocks = <&cmu CLOCK_AUTO CLOCK_BRANCH_EM01GRPACLK>;
 			status = "disabled";
 		};
-
-		radio: radio@b0000000 {
-			compatible = "silabs,series2-radio";
-			reg = <0xb0000000 0x1000000>;
-			interrupts = <31 1>, <32 1>, <33 1>, <34 1>, <35 1>, <36 1>,
-				     <37 1>, <38 1>, <39 1>, <40 1>;
-			interrupt-names = "agc", "bufc", "frc_pri", "frc", "modem", "protimer",
-					  "rac_rsm", "rac_seq", "prortc", "synth";
-			pa-initial-power-dbm = <10>;
-			pa-ramp-time-us = <10>;
-			pa-voltage-mv = <3300>;
-			pa-2p4ghz = "highest";
-		};
 	};
 };